#include<stdio.h>

int sum_ab(int m,int n)
{
    return m + n;    
}


int mul_ab(int m,int n)
{
    return m * n;
}


int main()
{
  printf("please enter 2 number:\n");

  int a,b,sum;
  scanf("%d %d",&a,&b);
  printf("sum=%d\n",sum_ab(a,b));
  printf("mul=%d\n",mul_ab(a,b));

  return 0;
}

